The Largest Swimming Pool in the World
Here is a pic of this pool, it's 3,324 ft in length (.6 of a mile). Is this pool curved or perfectly level / flat from end to end? If the water level was raised to the very top of the wall holding it in and one of the far ends of it was dropped one or two inches what would happen? A lot of water would run out of it until a new level was reached.
Now are we to believe that the ocean water next to it is slightly curved?
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Imagine a pool that's a mile long, would it be curved or flat? How much water would flow out of it if one end was dropped 8 inches? Your equation "1/100th of a percent" is a poor attempt to deceive us into thinking an 8 inch drop in a mile is not something we can measure and test.
--Dave
Dave, 3,324 feet is only 39,888 inches, less than 2/3 of a mile, which is 63360 inches.
If an 8-inch drop is imperceptible at 63,360 inches, how to you expect to see a smaller drop a drop than that at 39,888 inches away.
Dave, 8 inches of ANYTHING IS IMPERCEPTIBLE AT 63360 INCHES AWAY.
1/7920TH!
[MENTION=4980]DFT_Dave[/MENTION] Sorry, that didn't make much sense, here's is what I meant to say:
An 8-inch change in height is IMPERCEPTIBLE at 63360 inches (1 mile) away. The ratio is 1/7920.
Dave, just so you get an idea of how small that drop is, I want you to hold your arm out and put your hand horizontal at eye-level.
Now look 45 degrees downward. One mile away, that is a one mile drop. Now look back at your hand. The thickness of your fingernail is around 0.384mm. Over one mile, the amount of drop the thickness of your fingernail would cover is about 44.234 inches. less than 20% (about 18.1%) of the thickness of your fingernail is an 8 inch drop.
And yet you say you can see an 8 inch drop a mile away? It's NOT HUMANLY POSSIBLE, DAVE. Look at your fingernail. Can you even tell how thick 18.1% of the thickness of your fingernail is? To get an idea, you'd have to use a magnifying glass, and that's just to determine a rough estimate. And remember, you're holding your hand out at arms length at eye level. And again, at one mile away, the thickness of your fingernail would cover a drop of ~44.2 inches. Forget seeing an 8 inch drop, even a 44 inch drop one mile away is IMPERCEPTIBLE to the naked eye.
To answer your questions Dave, the pool is indeed curved, but the curve IS NOT PERCEPTIBLE TO THE NAKED EYE.
Yes, the ocean next to the pool is indeed curved, but the curve IS NOT PERCEPTIBLE TO THE NAKED EYE.
DAVE, if the water is curved around the center of the earth, then it will remain curved after finding a new level, even after the water
level is lowered, because the water will still be curved around the center of the earth.
Dave, I get what you're trying to say, that if the earth was flat, a drop on the side of a completely filled pool of water would cause the water to spill out, and therefore if the earth is flat, then the oceans shouldn't be curved.
But we're not on a flat earth. We're on a globe. And gravity is pulling everything equally towards the center of the earth, and therefore water still finds it's level, but instead of the surface being flat, it's curved, because gravity is pulling every water molecule equally throughout the entire pool.
The pool would be curved if it were a mile long, or if it was 10 miles long, or if it were 10 feet long.
If 1 side were dropped 8 inches, then 8 inches of water would drop out throughout the entire pool, regardless of its size, and the water would still be curved, regardless of its size.
Dave, no one is saying that the drop isn't measurable. We're saying it's not possible to see.
